JPS5888403A - Centering regulator for turbine engine impeller and turbine engine with means enabling application of said device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turbine engine. The present invention is particularly applicable to tar C
The present invention relates to a device for adjusting the impeller of a fan engine with respect to a fixed shaft surrounding the impeller.The present invention is particularly advantageous when it concerns a high-pressure stage of a turn of a tarjet engine. . In this high-pressure stage, the strict 6-blade closure of the impeller is particularly important. The invention also relates to a turbine engine provided with means enabling the application of said regulating device.

Ants are also widely used to ensure that this work is carried out, and the nine methods are as follows.

- providing a pre-finish section when machining the cylindrical inner bearing surface of the turbine frame; The shaft is supported in this spare part, and the A constant bearing closest to the impeller is housed therein.

Temporary assembly of the frame portion of the stator, including the support surface and rings.

- Measuring the relative eccentricity of the bearing surface and the ring and machining the bearing surface to a rounding that is within one eccentricity t4.

Method ξ is reliable, but temporary assembly can be avoided and tk%
/%. The disadvantage is that when the Turzen O configuration adopts the Molière method, for example, the HP stage (high pressure) is replaced by the MP stage (medium pressure) or the IP stage (low pressure).
This is a problem if they are manufactured completely independently from each other or are interconnected without coordination.

It has already been proposed in Flyyx411Kokaikai 11N, No. 434,09 to provide a circular ring-shaped supporting surface eccentrically to the ENO YOIIk mat. This bearing surface is provided on the intermediate wheel that joins the frame part of the turbine containing the fixed shaft to the frame part containing the support of the fixed bearing. The centering adjustment of the shaft is therefore calculated and determined during the assembly of the two parts of the frame by measuring the relative eccentricity between the fixed ring and the bearing support surface, and by imposing a northerly direction on these intermediate wheels. It will be done. This solution necessitates the manufacture of a supporting surface of the intermediate wheel with a small eccentricity in order to obtain correction of the eccentricity of the p-axis by vector addition of one center of the intermediate wheel. This method cannot be applied when the diameters of these rings are large.

The object of the present invention is to provide a *II device which does not have any of the above-mentioned disadvantages and which, moreover, allows easy centering of the impeller in an already installed turbine.

The device of the present invention is of a round type which makes it possible to adjust the center of the impeller with respect to the fixed wheels surrounding the impeller, and the impeller is mounted on a frame of 111. Tie%/
It is supported by a shaft that is inserted into the housing and rotates in a fixed bearing, and is characterized by comprising the following devices:

- a removable device for measuring the amplitude and direction of the eccentricity of the impeller with respect to the fixed wheel, coupled to the fixed bearing closest to the impeller; means.

It will be clear that the removable measuring device arrangement is problematic depending on whether the centering adjustment is to be made during assembly of the turbine component or to correct for eccentricity existing in an already installed tardy.

As for the rounding means fixed to the fixed bearing to reduce the eccentricity, these means are preferably inserted between the shaft and the fixed bearing and have a round annular compensating ring I, and in fact the fixed bearing and its Preferably a ring is included between the receiving part and the cylinder, and the external and internal bearing surfaces of the cylinder are measured so that the ring can be accurately corrected by proper orientation of the correction cylinder. 100 million equal to the center.

According to the general definition of the invention described above, the shaft described here is not necessarily a shaft that directly supports an impeller (although in practice, it is a shaft that directly supports an impeller). However, the shaft of the impeller to be centered (impeller HP stage) is supported by a shaft bearing supported by the shaft rotating vtwA in a fixed bearing (impeller shaft op stage or MP stage). In the case of twin-hulled turbines, the rounding means to reduce the eccentricity value is coupled to a fixed bearing close to this impeller.Therefore, the impeller re-centering is done via the shaft BFJR or MPR1 and the shaft HP stage. It will be seen that this process considerably facilitates the installation of the correction ring.

Hon f! RO and other bone qualities and advantages will become clear from the following description, which shows an example of an eccentricity measuring device and a rounding device for reducing the eccentricity value, with reference to the accompanying drawings.

Figure III primarily shows only mechanical components that are useful for understanding the invention; for example, seals, assembly flanges, etc. are not shown here. - The stator BP is fixed to a series of fixed blade disks 11t, supporting blades 11to, and the upper seven twists of the blade box 10, and the first disk of the fixed blades 11m constituting the inlet distribution housing of the BPJ & Jere. On the top 7 shafts of the ring 1 m, including the special supporting suyda shim, there is a fixed shaft 13 defining the jet 1111 HP of the HP stator, and the upper flange t) Klikl of the HP stator is fixed, A portion including the T-shaped lever L14 that supports the fixed ring 13 is fixed. Finally, the blade box is a turbine frame member! The lower flange is fixed to the upper flange of S.

The 8P rotor includes the following elements.

Each one is a movable blade disc! A disc that supports your will! B including l'i
P vane army, a disk comprising an outer surface 28 supporting the disk sl and an inner surface 8 to which the @mss is fixed by its central part? 4
- a conical support 31 whose outer periphery is fixed to the frame member 15;
A shaft comprising a 7 flange 2s whose lower end abuts in a fixed bearing 4o housed in the inner diameter of the shaft, and whose side surface 86 is fixed by its center! The 4° HPgi trochanter SO includes the following elements:

- A disk Sl supporting the movable vane disk 52.

- A conical shaft SS that is integral with the upper part of the disc s1 and supported by an 8P shaft 4 via an inter-shaft bearing B4.

and is arranged on the upper part of one circular plate ii and is integral therewith, and has a shaft 1
Hollow surrounding 4 @”m s, upper end of hollow shaft ss 04
t-disclose. This axis am is the upper 11KII of the HP compressor.
It is clear that you will be guided.

The members constituting the HP11 trochanter are indicated by dotted lines.

The reason for this is that the measuring device was installed before installing this rotor.
(See the back) must be used.

The manner in which the fixed bearing 4 is mounted according to the invention in the bearing 11 is shown in FIG. 14 is fitted, Marunouchi Rinda 4K, ξro 4! Expansion 4
- It is a roller bearing that is housed within the inner diameter sl and includes a nine outer circumference V/43. The ring/48 is equipped with a foot 44 which makes it possible to fix it to the flat support surface sl of the stool 31 using the bolt 4st.

According to Hontatemei, the ring 43 in the inner ring of Nat 310
Centering is ensured via a replaceable conductor 46. This is important when measuring eccentricity! 4. Ring 46 with cylindrical concentric supports m4th and 411A (
In order to ensure that the shaft 24 is realigned within the support 31 according to the instructions provided by the measuring device described below, the ring 46 is adjusted to a suitable value (distance 11110 m and 01 from the respective center), as shown in FIG. The ring 4@B (FIG. 4) has four cylindrical support surfaces B and 48B that are eccentric by .

To facilitate accurate positioning of the ring 46B, the scissor ring is provided with exposed indicia on one side, a symbol Xx to indicate a more desirable eccentric direction, and a radially opposite symbol X to indicate a slightly more eccentric direction. The maintenance of the orientation of the eccentric ring 41B is ensured by tightening this eccentric ring in the axial direction using the poles 4B that abut against the 7 flange 44.

Maintaining this orientation is also the contact surface of ring 46B/-)
This can also be achieved reliably by a cross-fit between the part opposite to 11.

Now, returning to FIG. 1 and S, the measuring device of the present invention and its usage will be explained. This measuring device includes a measuring frame 60 and a measuring arm To.
is a rift having a vertical arm 61 for fixing the turbine frame Is at its lower part by seven lunges, and its horizontal arm 6g supports the arm 61 and the shaft support 6s. Arm 1 has a large size that allows the bearing to move close to 40 km at its upper part. 11064 are provided.

Turbine frame (turbine frame member ls, blade box t
o-1m,! The thread 14) first crosses the frame member 150 lower 7 flange 151! Vertical arm using
The next shaft snow 4, which is fixed to l, is fixed to support l1 via a bearing 40 and a cylinder having a concentric support surface (IllEIII), and is supported upwardly by a round bearing S. and is mounted in a circular anchor-shaped support 31 (accessible by the locking row 4 of the measuring frame).

The position of the bearing 6i can be adjusted in two directions transverse to the turbine axis if necessary. This adjustment is accomplished using, for example, a lateral arm (not shown) and a key such as 66.

An eccentricity measuring arm 70 is attached to the shaft 14.

This arm is on the one hand fixed on the shaft by a screw 73! ? 71, which is fixed by its legs with respect to +1, and on the other hand is parallel to the axis of -34 and can slide on -71 and be fixed in its limited position. It includes 93 arm supports fixed to 76 and 7 nuts respectively.

The first measuring step is, on the one hand, the feces of Zotush 14.

A comparator 78 having a stylus that probes the upper plane of the needle 141 is attached to the external arm i4, while the shaft 24 is rotated and the stylus remains below a predetermined limit ( For example, the position of the bearing 6s is adjusted from 0 to 30 oc a y ). axis 24
It is certain that the axis xx is perpendicular to the 1410 plane of the flange and therefore parallel to the axis of the BP stator.The second measurement step is to fix the shaft 84 while rotating. It is to utilize a contact/arm arm 9 supported by an internal arm Ts for probing the inner wall of the ring tS. 1
The reading of the instructions on the 1st lever/9ator determines the eccentricity of the shaft and the wheel, and therefore the 9merinda 4 corrects this eccentricity.
6B (assigned to Figure 4)) position and eccentricity 01-0!
t'. The cylinder 46B may be custom made or selected from a set of beams/das distributed within a predetermined range and having nine eccentricity values.

4L Comparator if necessary? Shaft using 8 and bearing 6S! The test is performed by correcting the 40 position to the new nine and taking a new eccentricity measurement using the con/armpit-tamer. If the results are within the tolerances, it is possible to remove the fixing device and reinstall the turbine.

In the nine specific examples of the present invention explained above, support 31-
The re-centering of the shaft 24 within the inner diameter (Fig.
6 to ensure this is done.

The example described above is for a twin-hulled turbine with a conical shaft HPIS 8 mounted on the shaft B F 14 with an intershaft bearing 54 . As already pointed out, the invention can be applied without any difficulties if the HP turbine shaft is supported on a fixed part by means of a bearing.

The realignment is therefore carried out using a nine eccentric ring inserted along the lower fixed bearing.

Now, FIG. 6 shows an assembled tar C utilized in accordance with the present invention.
2 shows a rounding measuring device for adjusting the centering of the HP impeller within the engine. The turbines shown in FIGS. 1 and 5 are in question here. This measuring device is one of the HP shaft impellers.
It is sufficient to remove the flange 14i for rounding to install this comparator, including the electric flange 179 glued to the flange. The transmission of the commands of the controller is carried out by means of a flexible cassette wrapped around the rear of the HP disc 51 (Fig. Fixation is carried out when the motor is closed again.The centering of the HP impeller is achieved by replacing the ring 46 (Fig. 2) which allows access to the side of the frame member ti. Corrected in some cases.

The con/arm m-179 can then be removed through the inspection orifice.

[Brief explanation of drawings]

Figure 1 shows the process of assembling the parts of the twin-hulled turbine.
The installation of the IP impeller 1 centering device used based on the 9 axial half-view of the upper part of the turbine, IIE! The figure shows an axial interruption on an enlarged scale of the upper part of a fixed bearing on the downstream side of the 9OP turbine shaft carried out according to the invention. , FIG. 4 is an explanatory diagram using the same intermediate scale of an adjustment wheel to be replaced with this test wheel, FIG. 5 is a schematic sectional view of the entire cough eccentricity measuring device, and FIG. 6 is a schematic diagram showing a modification of the measuring device. It is a diagram. io... Feather box, 11... Fixed blade, 13... Fixed wheel, 15... Turpin frame, 22... Rotating blade, 2
4.° Turpin shaft, 40... Fixed bearing, 5G...
Impeller, 60゜O...amplitude measuring device. Agent Benhoshi Imamura Hajime

Claims (1)

[Scope of Claims] It) A device for adjusting the centering of an impeller with respect to a fixed ring surrounding the impeller of the turbine, wherein the blade impeller is connected to the frame of the turbine and inserted into a receiving part, and has nine fixed bearings. a removable device for measuring the amplitude and direction of the eccentricity of the impeller starting from the fixed wheel, and/or two for measuring the eccentricity of the impeller within predetermined limits; A centering adjustment device characterized in that it includes nine means for rounding the impeller and connecting it to a fixed bearing. (2) When the impeller rotates, the scissors measuring device measures the change in distance that occurs between the fixed ring and the nine defined points of the impeller, and the bias supported at the limiting points in the rounding. 2. A device according to claim 1, characterized in that it includes a position transducer. (3) The # measurement device includes a □ measurement frame including means for fixing the turbine frame; □ a rounded measurement frame that corrects the orientation of the axis of the turbine shaft so as to make the axis of the turbine shaft parallel to the axis of the fixed ring; and - means for measuring the eccentricity of the turbine shaft and the stationary wheel when the two axes are thus parallel. Equipment described in Section. (4) The means for correcting the direction of the axis of the turbine shaft of the measuring frame is integral with the measuring frame and includes a bearing that supports the turbine shaft, and the flange bearing is aligned with the axis of the cuff. Claim 118 characterized in that it comprises means for modifying the position in eight orthogonal transverse directions relative to the
Equipment described in Section. (5) the fixed ring is supported by a nosh comprising an assembly ftnge, and the means for correcting the orientation of the axis of the turbine shaft is further fixed on the one hand to the shaft and transverse to the shaft; nine oriented arms, on the other hand, comprising nine deflection transducers supported on the rounding arms for measuring the change in distance that occurs between the arms and the acid flange as the shaft rotates; Fa stated in claim 4
O device. An arm fixed to a shaft is, on the other hand, fixed at a point at which a light is set to determine the change in distance tm that occurs between nine defined points on the arm and the fixed ring when the shaft rotates. Claim IK4 characterized in that it comprises a deflection transducer that is
The device described in Section 1 in Section 5. (7) said means coupled to said fixed bearing having 411 eccentrically eccentric inner bearing surfaces and outer bearing surfaces, said fixed bearing in contact with said scissor inner bearing surface and 411 in contact with said outer bearing surface; The amplitude of the eccentricity of the support surface, the orientation of the ring, and the eccentricity of the impeller with respect to the fixed ring are determined in advance by a ring inserted between the ring and the bearing-shaped ring provided in the bearing support. The device according to any one of claims 1 to #I6, characterized in that the device is operated so as to be less than or equal to a predetermined limit. (8) that the impeller is supported directly on the turbine shaft mounted in a fixed bearing integral with the turpin frame, and that the means are connected to the fixed bearing closest to the impeller; Featured claims @1ull to 1
O device described in any of Section s7. (9) The axillary impeller is supported by a first shaft integral with an intershaft bearing supported by a second shaft installed in the fixed bearing integral with the turn frame, and the means is connected to the impeller. Device according to any one of claims 1 to 1 O, characterized in that it is connected to the nearest fixed bearing. 04i11 Mounted in a fixed bearing and supported on a round shaft and containing at least one impeller, a ring with a relative eccentric inner bearing surface and an outer bearing surface is provided so that the moth is also close to the flange impeller. , and that the fixed bearing is in contact with the inner support surface of the armor, and the fixed bearing is in contact with the outer support surface and is provided in the bearing part of the fixed bearing and is inserted between the round bearing accommodating part and 0. A moldy turbine engine. U is mounted in a fixed bearing integral with the scissor turbine frame, supported on the two shafts, supported on a first shaft integral with a round shaft bearing, and includes at least one impeller, A ring having an inner bearing surface and an outer bearing surface which are eccentric to the impeller and which is closest to the impeller and in contact with the inner bearing surface and which is in contact with the outer bearing surface and which is in contact with the bearing surface of the fixed bearing. A turbine engine, characterized in that it is inserted between a bearing accommodating part provided in the turbine engine.